TMJ Symptoms. The most common symptom of TMJ disorder is pain. TMJ symptoms include 1  : Facial pain in the jaw joint area, neck and shoulders, and/or close to the ear when chewing, speaking or opening the mouth wide. 2  Limited ability to open the mouth very wide. 3  Jaw that âlocksâ in the open or closed mouth position.
An overactive immune system. If you are born with certain genes, your immune system may react to substances in the environment that are normally harmless. These substances are called allergens. Having an allergic reaction is the most common example of an overactive immune system.hen your immune system doesn't work the way it should, it is called an immune system or immunodeficiency disorder. You may: Be born with a weak immune system. This is called primary immune deficiency.
The immune system is a system of many biological structures and processes within an organism that protects against disease. To function properly, an immune system must detect a wide variety of agents, known as pathogens, from viruses to parasitic worms, and distinguish them from the organism's own healthy tissue.ypersensitivity is an immune response that damages the body's own tissues. They are divided into four classes (Type I â IV) based on the mechanisms involved and the time course of the hypersensitive reaction. Type I hypersensitivity is an immediate or anaphylactic reaction, often associated with allergy.